taylor



Y (N0 Moldelf) l W' H' TAYLORt No. 567,206. Patented sept. 8, 1896. l

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` i UNITED STATES PATENT OFFICE. i'

wARRENII. TAYLOR, CE sTAMEoRD, CONNECTICUT, AssIGNCR To THE YALE a TowNE IvIANUEACTURINCr COMPANY, CE sAME PLACE.

APADLOCK.

SPECIFICATION forming part of Letters Patent No. 567,206, dated September 8, 1896. Application filed December 7, 1895. Serial No. 571,421. (Np model.)

To all whom it may concern.-

Be it known that I, WARREN I-I. TAYLOR, a

--citizen of the United States, residing at Stampreventing the unlocking of a lock by jarring,

whichl method has been heretofore used by producing a pressureof the fence upon the tumblers, and then byfljarring causing the tumblers to creep, so that the fence will inally fall into the gating of the tumblers and thus unlock the lock.

The explanation of the possibility for improperly opening a lock by jarring the tumblers in the manner referred to is that the inertia of the tumblers, when jarred, is sufficient to overcome their springs, which hold them normally in disconcerted positions, the

friction of the dog holding them in the newposition after each movement, so that aprogressive or creeping movement results from continued jarring. I defeat the possibility of thus tampering with locks of this character by providing a safety-tumbler which is so constructed as to creep unequally with the locking-tumblers, and thus render it impossible to assemble, by jarring, all the gates at unlocking position. Obviously the rapidity of this creeping action in any one tumbler will be determined by the relationwhich exists between its inertia and the strength of the opposing spring. This inequality of creeping among the several tumblers is brought about by dilferentiatin g the relations which exist between the inertia of the respective tumblers and their opposing springs. As the springs are conveniently manufactured of equal strength, this dierentiating Vmay be conveniently effected by making the l weight of the safety-tumbler different from that of the others.

I show my improved device in connection with a padlock, but its advantages are not confined to a padlock, but may be used with any locking mechanism where the fence bears or may bear against tumblers.

In order that my invention maybe fully understood, I will proceed to describe the same with reference to the accompanying drawings, in whichl Figure 1 is a side View of the lock with one side of the casing removed. Fig. 2 is a vertical section of the same. Fig. 3 is a view'of the tumbler employed for keeping the lock securely locked against fraud ulent openin g, and Fig. 4L is a view of the combined dog and detent. 4 l In the said drawings, l represents the Casing of the lock, and 2= the shackle, which is pivoted to the frame 3, carrying the lock mechanism.` 4 represents the Combined dog and detent, which is pivoted to the frame 3. It is provided with the head 5, which engages with the end 6 of the shackle, and with the heel 7, which engages with the end 8 of the shackle when in its locked position. The dog is also provided with the fence 9, which when the tumblers 10 are assembled falls into the gates Il, and which movementwithdraws the dog from engagement with the ends of the shackle and allows the coiled spring l2 to throw the shackle into unlocked position.

13 represents a pin on which the tumblers are pivoted.

14 represents the springs for disconcerting the tumblers, and l5 represents the key-plug.

16 represents atumbler which is inserted at any convenient point in the nest of tumblers, and it is made, preferably, with the end 17 which is farthest away from the pivot somewhat heavier than the ends of the other tumblers. This tumbler is gated so that the gating always stands under the fence of the dog when the lock is in locked position. The key is so bitted that in unlocking the lock it will set the other tumblers, so that their gatings will coincide beneath the fence, but it will not act upon the tumbler 16, leaving the position of this tumbler undisturbed, so that when the other tumblers are set the fence will drop into the gatings of all the tumblers.

It will be understood that in locks which are constructed upon this general plan it is sometimes possible to open them by producing a pressure of the fence upon the tumblers in the lock, as, for instance, 'by exerting an upward pressure on the shackle of the padlock, then, by jarring, the tumblers Will tend to creep along underneath the fence, which Will IOO fall into them, and the look Will thus be opened; but in thisr construction, when such a method of opening is attempted, the first tumbler to creep, ovvin g to its greater Weight, Will be the tumbler 16, and when this occurs the gating in this tumbler Will pass from under the fence, and the lockv Will thus be preventedfrom opening. This tumbler will act as a guard-tumbler also in case any key but the proper one is inserted, so as to operate the tumblers, because in that case the moving of the tumbler Will cause the gating to move away fromy the fence, thus also preventing the opening of the lock.

It is not necessary for the operation of this device that the gating of the guard-tumblerv It is should be normally under the fence. merely necessary that it should be in different relation t-o the fence than the other gatings, and that the ratel of travel of the guardtumbler should be so different from the Vrate of travel of the others that at the. same time theregular tumble-rs had their gatings under the fence the. gating of the guard-tumbler Would not be under the fence.

Having thus fully described my invention, the following is WhatI claim as new and desire to secure by Letters Patent:

1. In a lock, the combination With one or more tumblers, of a supplementary guardtumbler, Whose gating is normally opposite the felice, but When said guard-tumbler is moved by a false key or by jarring, said gating will pass away from the fence and thus prevent the unlocking of" the lock.

' 2. In a lock, the combination of two or m ore tumblers havin g In cans for holding them normally in disconcerted positions relatively to the fence, one of said tumblers being arranged to travel `at different rate from the others When moved by jarring the lock, as explained, so that it Will be impossible to concert the gatings beneath the fence by this means.

3. In a lock the combination With one or more-tumblers, a Weighted guard-tumbler having its gate normally under the fence of the bolt, and adapted to move and prevent theunlocking of the lock when any unauthorized attempt is made to unlock the lock, substantially as.V described.

WARREN n. TAYLOR. Witnesses:

SOHUYLER MERRITT, Guo. E. WHITE.- 

